Same place



(No Model.) 2 Sheets-Sheet 1.

R. BAUER. SAW FILING MACHINE.

No. 543,204.,' Patented July 23, 1895.

(No Model.) 2 SheetsSheet 2.

R. BAUER.

SAW FILING MAGHINB. N0. 543,Z04. Patented July 23, 1895.

UNITED STATES.

RICHARD BAUER, or nEw YORK, N.

Y., Assieno R TO PAUL PRYIBIL, or

SAME PLACE. v

- sAw-Flu NG MAC HAINE.

SPECIFICATION forming part of Letters Patent No. 543,204., dated July23, 18 95.

Applioationfiled June 28, 1894..

New York, have invented a new and useful Improvement in Saw --FilingMachines, of which the following is a specification.

The improvement which is the subject of this invention relatesespecially to machines for the filing of circular saws.

Figures 1 and 2 represent elevations at right angles to. each other of acircular-saw-filing machine embodying my invention. Fig. 3 represents ahorizontal section taken in the line 3 3 of Fig. 2. Fig. lis a side viewof part of themechanism for turning the saw. Fig. 5 represents aVertical section of the central supportfor the saw. Fig. 6 represents avertical section taken transversely to Fig. 1, in the line 6 6 of thatfigure, viewed in the opposite direction to Fig. 2. Fig. 7 is a detailView, taken parallel with Fig. 1, of the movable memberof the saw-clampand the means of operating it. Figs. 8 and 9 are diagrams which will behereinafter explained.

Similar letters of reference designate corresponding parts in all thefigures.

A is a base, on which are erected standards B and G. The standard Bcomprises a journal-box B, in which rotates a shaft S, fromwhich motionis imparted to all parts of the machine- The standard 0 comprises a'horizontal guide 0', which is arranged at right angles to the shaft Sand in which works a reciprocating carriage D, in which the fileholder Eis pivoted in such manner by pivots a a as to be capable of swinging ina direction transverse to the reciprocating movement of said carriagefor the purpose of bringing down the file e tothe proper level forfiling the saw 0 and for raising the file to a suitable height to allowthe teeth of the saw 'to pass under it to be presented to it one at atime,

successively,by the rotation of the saw upon a supporting-pivot N,which, with its supporting and adjusting devices, will be hereinafter.more fully described.

The shaftS is represented as furnished near one end with fast andloosedriving-pulleys F F for a driving-belt, and the said end is representedat 10 (see Fig. 2) squared for the reception of a hand-crank to operatethe mai D to produce the filing movement.

Serial No. 515,945. No model.)

chine by hand if desired. At the other end the. shaft carries a disk H,in which is a crankpin H, serving through a connecting-rod Jto give areciprocating movement to the carriage I The said disk has upon it a camI forthe purpose of operating the movable member K of the clamp] saiddisk a grooved cam L for turning the saw upon the pivot N, on which itis centrally supported, and thereby feeding its teeth one at a time tothe file, as will be hereinafter explained.

The fixed member K of the clamp is formed on a bracket K*, which isrigidly affixed to and dependent from the file-carriage guide O.. Themovable member K of the said clamp, which is shown in Figs. 1 and 6, and

also shown with its operating mechanism in Fig.7, is formed on orcarried by one end of a lever lo, which works on a fixed fulcrum it,supported on the base A, and the other end of which overlies one end ofa lever I, which works on a fixed fulcrum i, secured in the standard 0.The other end of the lever I underlies the cam I on the shaft S. Thiscamduring about or nearly half a revolution of the shaft S depresses itsend of the lever I and so-raises the other end of the said lever,

and with it the contiguous end of the lever is,

clamp the saw during the filing operation.

During the rest of the revolution of the cam I the clamp member K isleft loose to permit the turning of the saw. In order to adjust theoperation'of the clamp for saws of difierent thicknesses, the Contactbetween the levers k and I is made by means ofan adjusting-screw i,which screws through that and bears upon that I- The above-describedconstruction and arrangement of the saw-clamp leaves a clear openingbelow the clamp for the passage of the saw.

' For the purpose of producing the necessary downward pressure on thefile to make it operate effectively a spring at is attached to the underside of the connecting-rod J by two lift the file clear of the teeth ofthe saw to'allow the saw to turn to present successive teeth there is aprojection e on the holder,

whichso overlies the connecting-rod J that the said rod during itsbackward movement, produced in the upper half of the revolution of thecrank-pin l-l, willbe brought in contact with the said projection andwill lift the holder.

The turning of the saw to present its teeth successively to the file isproduced by a pawl or dogf, (seeFigs. 1, 2, and (3,) which is pivoted toone end of the arm L on one end of a rock-shaft L which works inbearings g g, provided on the base A, the other end of the saidrock-shaft being furnished with an arm L which is fast upon it, and anarm L which is loose upon it, the, loose arm L carrying a roller U, theedge of which is received in a groove in the periphery of the cam L. Thesaid rock-shaft, with its fast and loose arms, and the cam L are shownin Fig. t, which isa view looking toward the right-hand end of Fig. 2.The loose arm L4 has screwed through it an adjusting-screw g, throughwhich the cam, acting upon the loose arm, acts upon the arm L and uponthe rock-shaft L and pawl fto turn the saw.

The return movement of the' pawl is produced bymeans of a spring 9 (seeFig. 6) acting upon a toe g on the' rock shaft L The distance of thisreturn movement is regulated by a stop-screw 9 which is screwed throughthe base A above the toe g The distance of the forward movement; of thepawl is regulated by a screw 9 on the loose arm L of the rock-shaft.

The saw-supporting pivot N is made adjustable in two ways,viz: first,upward and downward toward and from the file-carriage D and clamp toprovide for placing saws of different diameters with their teeth at theproper height to be operated upon by the file, and, second, in adirection transverse to the file-carriage D and the clamp to provide inusing the machine to file saws with teeth of different shapes for theclearance of the file from the teeth when the file is lifted after thefiling of one tooth and preparatory to the filing of the next one, andfor the purposes of these two adjustments the said pivot N is secured ina lever N'N of variable length,the fulcrum of which is a pin P supportedin a bearing in a bracket P carried by the baseA. This lever N N iscomposed, as shown in Figs. 2, 3, and 6, of two parts, viz: a stock Nand a bar N fitted to slide lengthwise in the said stock. The stock N ispermanently'affixed to the fulcrum-pin P, and it also has affixed to ita stud n, as shown in Figs. 2 and 3, which passes through a slot n inthe bar'N, the said stud n being screw-threaded at its outer end, whichpro jects from the said slot, and being fitted with a clamping-nut 11 bywhich the bar N is permanently secured in its longitudinal. adjustmentwithin the stock N The said longitudinal adjustment provides for thelateral adjustmentof the saw relatively to the clamp and thefile-carriage, or, in other words, its adjustment across the path of thefile-carriage. In order to provide for the upward and downwardadjustment for saws of different diameters there is an adjusting-screwQ, which screws through a lugp 0n the bracket P and bears on aprojection 02 on the stock N By screwing down this screw Q upon theprojection 42 which constitutes one end of the lever N N the said leveris turned upon its fulcrum and the other end of the said lever, carryingthe saw-supporting pivot N, is raised, and with it the saw upon it, andby turning back the said screw the heavier end of the lever, having thepivot N and the saw upon it, is caused to descend by the greater weight.The screw Q thus serves to adjust the saw to the proper height,according to its diameter. The lateral adj ustment is provided for byunscrewing the nut 07. and sliding the bar N within the stock N and thenscrewing up the nut.-

To explain the object and effect of the lateral adjustment of the sawrelatively to the file-holder E and saw-clamp, I will first point outwith reference to Fig. 6 that every part of the file in being lifted bythe movement of the carriage E on its pivots a adescribes an arc of acircle. The are .described by the lower edge of the file is indicated byan arrow 11 in that figure, and it will be understood that in thelifting ofthe file the lower edge of the file clears such teeth as arerepresented in the saw in that figure. In said figure thesupporting-pivot N and the center of the saw are vertically below thefile.

Referring now to the diagram Fig. 8, in which a saw having teeth of ashape different from those shown in Fig. 6 is arranged with its centerdirectly below the file, as in Fig. 6, it will be seen that the filecould not make the movement indicated by the arrow 11, because its loweredge and its left-hand side would be obstructed by the tooth; but onreferring to Fig. 9, in which the supportingpivot N and the center ofthe saw having teeth just like those shown in Fig. 8 are brought, bythe'adjustment of the lever N N to a position considerably to the rightof that shown in Figs. 6 and 8, the movement of the file indicated bythe arrow 11 carries it clear of the tooth.

To provide for the turning of the saw and the supporting-pivot N withsufficient freedom and yet keeping it accurately centered thereon, thesaid pivot is fitted with a concentric clamp q, of conical form, asshown in Fig. 5, the said clamp fitting the eye of any saw. This clampis secured upon the pivot N by a collar q and a binding-screw g whichsets the collar upon'the pivot. The face of the bar N is countersunkaround the pivot,

part of the subject-matter of my application for patent, Serial No.515,944, filed June 28, 1894.

What I claim as my invention is- 1. The combination with a saw clamp anda file carriage, of a lever which is adjustable lengthwise relatively toits fulcrum and transversely to the path of the file carriage and a sawsupporting pivot carried by said lever,

substantially as herein set forth.

2. In a machine for filing circular saws, the combination with a sawclamp and a file carriage, of a saw carrying lever consisting of a stockand a bar adjustable lengthwise therein the said stock having afixed-relation to the fulcrum of the lever and the said bar carrying apivot for the saw and being adjustable lengthwise within said stock,substantially as and for thepurpose herein set forth.

RICHARD BAUER. l/Vitnesses:

FREDK. HAYNES, GEORGE BARRY.

